This patch uses the reworked exception handling support to handle
runtime service requests through SMCs following the SMC calling
convention. This is a giant commit since all the changes are
inter-related. It does the following:
1. Replace the old exception handling mechanism with the new one
2. Enforce that SP_EL0 is used C runtime stacks.
3. Ensures that the cold and warm boot paths use the 'cpu_context'
structure to program an ERET into the next lower EL.
4. Ensures that SP_EL3 always points to the next 'cpu_context'
structure prior to an ERET into the next lower EL
5. Introduces a PSCI SMC handler which completes the use of PSCI as a
runtime service
Change-Id: I661797f834c0803d2c674d20f504df1b04c2b852
Co-authored-by: Achin Gupta <achin.gupta@arm.com>
The modified implementation uses the IO abstraction rather than
making direct semi-hosting calls. The semi-hosting driver is now
registered for the FVP platform during initialisation of each boot
stage where it is used. Additionally, the FVP platform includes a
straightforward implementation of 'plat_get_image_source' which
provides a generic means for the 'load_image' function to determine
how to access the image data.
Change-Id: Ia34457b471dbee990c7b3c79de7aee4ceea51aa6
This is intended primarily for use as a storage abstraction.
It allows operations such as image-loading to be implemented
in a platform-independent fashion. Each platform registers
a set of IO drivers during initialisation. The platform must
also provide a function that will return a device and a specifier
that can be used to access specified content.
Clients of the API will primarily use device and entity handles.
The term "entity" is deliberately vague, to allow for different
representations of content accessed using different types of
specifier, but will often be interpreted as a "file" where the
specifier will normally be its path.
This commit builds, but is intended to be paired with a sample
implementation of "load_image" using a semi-hosting driver on FVP.
Change-Id: Id3b52f1c0eb9ce76b44b99fc6b6460803668cc86
memmove needs to allow for overlapping memory regions and, together
with memcpy, should return the input destination pointer, not the
address after the end of the copied data.
fixesARM-software/tf-issues#18
Signed-off-by: Jon Medhurst <tixy@linaro.org>
Ctags seem to have a problem with generating tags for assembler symbols
when a comment immediately follows an assembly label.
This patch inserts a single space character between the label
definition and the following comments to help ctags.
The patch is generated by the command:
git ls-files -- \*.S | xargs sed -i 's/^\([^:]\+\):;/\1: ;/1'
Change-Id: If7a3c9d0f51207ea033cc8b8e1b34acaa0926475
The GICv3 distributor can have more ports than CPUs are available in
the system. Probe all re-distributors and use the matching affinity
levels as specified by each core and re-distributor to decide which
re-distributor to use with which CPU core.
If a core cannot be matched with a re-distributor, the core panics and
is placed in an endless loop.
Change-Id: Ie393cfe07c7449a2383959e3c968664882e18afc
SPSR is a 32-bit register and so its size should be reflected in
the gp_regs structure. This patch fixes the type of gp_regs.spsr
to use a 32-bit variable. It also makes the size of the other
register fields more explicit.
Change-Id: I27e0367df1a91cc501d5217c1b3856d4097c60ba
- This change is split into two separate patches in order to
simplify the history as interpreted by 'git'. The split is
between the move/rename and addition of new files.
- Remove dependency on toolchain C library headers and functions in
order to ensure behavioural compatibility between toolchains.
- Use FreeBSD as reference for C library implementation.
- Do not let GCC use default library include paths.
- Remove unused definitions in modified headers and implementations.
- Move C library files to 'lib/stdlib' and 'include/stdlib'.
- Break std.c functions out into separate files.
Change-Id: I3e3d8d992052264d2a02489034ae4c03bf0f5512
- This change is split into two separate patches in order to
simplify the history as interpreted by 'git'. The split is
between the move/rename and addition of new files.
- Remove dependency on toolchain C library headers and functions in
order to ensure behavioural compatibility between toolchains.
- Use FreeBSD as reference for C library implementation.
- Do not let GCC use default library include paths.
- Remove unused definitions in modified headers and implementations.
- Move C library files to 'lib/stdlib' and 'include/stdlib'.
- Break std.c functions out into separate files.
Change-Id: I91cddfb3229775f770ad781589670c57d347a154
The runtime exception handling assembler code used magic numbers for
saving and restoring the general purpose register context on stack
memory. The memory is interpreted as a 'gp_regs' structure and the
magic numbers are offsets to members of this structure. This patch
replaces the magic number offsets with constants. It also adds compile
time assertions to prevent an incorrect assembler view of this
structure.
Change-Id: Ibf125bfdd62ba3a33e58c5f1d71f8c229720781c
- Add instructions for contributing to ARM Trusted Firmware.
- Update copyright text in all files to acknowledge contributors.
Change-Id: I9311aac81b00c6c167d2f8c889aea403b84450e5
This patch makes sure the C runtime environment is properly
initialised before executing any C code.
- Zero-initialise NOBITS sections (e.g. the bss section).
- Relocate BL1 data from ROM to RAM.
Change-Id: I0da81b417b2f0d1f7ef667cc5131b1e47e22571f
Also, don't invalidate the TLBs in disable_mmu() function, it's better
to do it in enable_mmu() function just before actually enabling the
MMU.
Change-Id: Ib32d6660019b0b2c17254156aad4be67ab4970e1
Any asynchronous exception caused by the firmware should be handled
in the firmware itself. For this reason, unmask SError exceptions
(and Debug ones as well) on all boot paths. Also route external
abort and SError interrupts to EL3, otherwise they will target EL1.
Change-Id: I9c191d2d0dcfef85f265641c8460dfbb4d112092
Jeenu Viswambharan
James Morrissey
Jon Medhurst
Harry Liebel
Dan Handley
Sandrine Bailleux
Achin Gupta